Narrative:

I received a reroute; prior to leaving ZZZ that made crew rest that night legal by only two minutes; no longer legal crew rest after delayed first leg. Dispatch changed flight time from block of xa:55 to xa:45 to create legal rest for that night.looking into this; it looks like this change should have only been done with dispatch and captain agreement/coordination. I did not receive any contact from dispatch or crew scheduling at any point about that change. Even with the change by the time we landed it was a moot point. Legal reroute was created for next day.

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Original NASA ASRS Text

Title: Air carrier Captain reported Dispatch had changed the flight block time without communicating the change with the Captain.

Narrative: I received a reroute; prior to leaving ZZZ that made Crew rest that night legal by only two minutes; no longer legal Crew rest after delayed first leg. Dispatch changed flight time from block of XA:55 to XA:45 to create legal rest for that night.Looking into this; it looks like this change should have only been done with Dispatch and Captain agreement/coordination. I did not receive any contact from Dispatch or Crew Scheduling at any point about that change. Even with the change by the time we landed it was a moot point. Legal reroute was created for next day.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.